AMPC  Vol.1 No.2 , September 2011
Random Laser of R6G Dye and TiO2 Nanoparticals Doped in PMMA Polymer
ABSTRACT
The random laser (RL) based on organic Rhodamine 6G (R6G) laser- dye and Titanium dioxide (TiO2) suspended nanoparticles have been prepared with polymethylmethacrylate (PMMA) as a host. Both liquid and spray-coated homogeneous film samples of 22.4 µm - 30.1 µm thickness range were use. Optimum concentrations have been determined depending on the normal fluorescence spectra which give evidence that the laser dye provides amplification and TiO2 nanoparticles as scatter center. At the optimum concentrations, results of the random laser (RL) under second harmonic Nd: YAG laser ex-citation show that the values of bandwidth at full width half-maximum (FWHM) and the threshold energy are about 9 nm and 15 mJ respectively, which represent the minimum value for the liquid samples in the current research. Correspondly, these values become 14 nm and 15 mJ for film sample. The broadening that can be attributed to the concentration quenching of a laser dye at high concentration levels has been observed.

Cite this paper
nullB. Chiad, K. Latif, F. Kadhim and M. Hammed, "Random Laser of R6G Dye and TiO2 Nanoparticals Doped in PMMA Polymer," Advances in Materials Physics and Chemistry, Vol. 1 No. 2, 2011, pp. 20-25. doi: 10.4236/ampc.2011.12004.
References
[1]   V. S. Letokhov, “Stimulated Emission of an Ensemble of Scattering Particles with Negative Absorption,” Journal of Experimental and Theoretical Physics Letters, Vol. 5, 1967, pp. 212-215.

[2]   V. M. Markushev, V. F. Zolin and Ch. M. Briskina, “Luminescence and Stimulated Emission of Neodymium in Sodium Lanthanum Molybdate Powders,” Soviet Journal of Quantum Electronics, Vol. 16, 1986, pp. 281-283.

[3]   D. Anglos, A. Stassinopoulos, R. N. Das, G. Acharakis, M. Psyllaki, R. Jakubiak, R. A. Vaia, E. P. Giannelis and S. H. Anastasiadis, “Random Laser Action in Organ-ic―Inorganic Nanocomposites,” Journal of the Optical Society of America B, Vol. 21, 2004, 208-213.

[4]   A. M. Brito-Silva, G. André, S. L. Anderson, J. J. Alceni-sio and B. A. Cid, “Random Laser Action in Dye Solu-tions Containing St?ber Silica Nanoparticles,” Applied Physics, Vol. 108, 2010, p. 033508.

[5]   G. Zacharakis, N. A. Papadogiannis and T. G. Papazoglou, “Random Lasing Following Two-Photon Excitation of Highly Scattering Gain Media,” Applied Physics Letters, Vol. 81, 2002, pp. 2511-2513.

[6]   R. C. Polson, A. Chipoline and Z. V. Vardeny, “Random Lasing in π-Conjugated Films and Infiltrated Opals,” Advanced Materials, Vol. 13, 2001, pp. 760-764.

[7]   H. Cao, Y. Ling, J. Y. Xu, C. Q. Cao and P. Kumar “Photon Statistics of Random Lasers with Resonant Feedback,” Physical Review Letters, Vol. 86, 2001, pp. 4524-4527.

[8]   M. N. Shkunov, M. C. DeLong, M. E. Raikh, Z. V. Var-deny, A. A. Zakhidov and R. H. Baughman, “Photonic versus Random Lasing in Opal Single Crystals,” Synthetic Metals, Vol. 116, 2001, pp. 485-491.

[9]   D. Wiersma and S. Cavalier “Light Emission: A Temper-ature-Tunable random laser,” Nature, Vol. 414, 2001, pp. 708-709.

[10]   M. A. Noginov, “Solid-State Random Lasers,” Springer, 2005.

[11]   D. S. Wiersma, “The Physics and Applications of Random Lasers,” Nature Physics,. Vol. 4, 2008, pp. 359-367.

[12]   Y. Ling, H. Cao, A. L. Burin, M. A. Ratner, X. Liu and R. P. H. Chang, “Investigation of Random Lasers with Re-sonant Feedback,” Physical Review A, Vol. 64, No. 6, 2001, p. 063808. doi:10.1103/PhysRevA.64.063808

[13]   N. M. Lawandy, R. M. Salachandran, A. S. L. Gomes and E. Sauvain, “Laser Action in Strongly Scattering Media,” Nature, Vol. 368, 1994, pp. 436-438. doi:10.1038/368436a0

[14]   G. Beckering, S. J. Zilker, and D. Haarer, “Spectral Measurements of the Emission from Highly Scattering Gain Media,” Optics Letters, Vol. 2, No. 2, 1997, pp. 1427-1433.

[15]   H. Cao, “Lasing in Random Media, Waves in Random Media,” Vol. 13, 2003, p. 33.

[16]   C. M. Aegerter, M. St¨orzer, S. Fiebig, W. B¨uhrer and G. Maret, “Observation of Anderson Localization of Light in Three Dimensions,” Journal of the Optical Society of America A, Vol. 24, 2007, pp. A23-A27.

[17]   X. H. Sun, X. M. Tao, P. Xue, K. C. Kwan and J. G. Dang, “Low-Threshold Random Laser with One Mirror and Feedbacks in PMMA Nano-Composite Films,” Chi-nese Physics Letters, Vol. 22, No. 10, 2005, p. 222568.

[18]   V. Bulovic, “Organic Materials in Optoelectronic Applica-tions: Physical Processes and Active Devices,” Private Communication, www.rle.mit.edu/media/pr143/13.pdf

 
 
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